Respirator filter



FIG. 1 is a perspective view showing the new design for a respiratorfilter;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof, the left side view being a mirrorimage thereof;

FIG. 4 is a back view thereof; and,

FIG. 5 is a front view thereof.

The broken lines in the drawings depict portions of the respiratorfilter that form no part of the claimed design.

CLAIM The ornamental design for a respirator filter, as shown anddescribed.